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David Desper, 28, turned himself in Sunday and was charged in the road rage murder of 18-year-old Bianca Roberson. NBC10's Lauren Mayk walks us through the arrest and what's next for the suspect.

(Published Monday, July 3, 2017)

Two children walked into an overworked Chester County police department Monday and thanked officers for their long hours leading up to the arrest of a suspect in the high-profile Pennsylvania road rage murder of Bianca Roberson.

West Goshen police posted this photo of a card giving thanks from two kids named Emma and Trevor. The gracious children also brought in some donuts and coffee for the cops.

Roberson, 18, of West Chester, died from a gunshot wound to the head during rush hour last Wednesday along Route 100. The man arrested for allegedly shooting her, David Andrew Desper, of Trainer, was taken into custody Sunday after a four-day manhunt.

That dragnet spanned three states and tips poured in from the public as West Goshen police and Chester County law enforcement released several images and video clips of the red pickup truck that at least one witness identified as allegedly driven by Roberson's killer.

Those tips stretched from New Jersey to Texas.

But the epicenter of that search was West Goshen, a suburban Philadelphia town of roughly 20,000 that hasn't made national news since it was previously called one of the best places to live in America by Money Magazine. It's most known locally as home of the television sales giant, QVC.

"West Goshen Township has a lush, suburban feel, with quiet, tree-shaded residential areas, lovely parks, and a full slate of community activities," Money said of the township in 2013, when it was ranked 10th best place to live in the country.

Desper, 28, is being held without bail on a first-degree murder charge and other related charges. His preliminary hearing is set for July 13.

Photo credit: West Goshen Township Police

Roberson's parents sat quietly in the room, sobbing, while officials announced the arrest. They lost another child, an adult son, four years ago to heart disease.

On June 28, Desper and Roberson played what investigators previously called a game of "cat and mouse" while attempting to merge into the same lane on Route 100 in Chester County around 5:30 p.m., officials said. Roberson was heading home from a shopping trip. She would have left for college later this summer.

The shooter’s car fled the scene "at a high rate of speed on the shoulder of the spur before eventually crossing traffic and continuing southbound on the shoulder of Route 202," charging documents said.